Leisure EB 10 FRXC Possible Thermostat Failure

Last night , the conventional oven of this range cooker stopped working. I am leaning towards the thermostat having failed, as the oven doesn’t heat up and the orange temperature light stays off. However I have noted a couple of other issues, which all appear to have occurred together with the oven problem, these being the oven illumination lamp doesn’t come on and the plate warmer, on the hob, also isn’t working.
I could understand the link between the thermostat/switch and the oven lamp, but not the plate warmer.

Obviously I don’t want to order a part that I later find isn’t needed, so wondered if anyone on this forum could help. I have searched for a wiring diagram to see if the issues are linked, but to no avail.

Thanks

Steve